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Occupational asthma caused by fish inhalation

J Rodríguez1, M Reaño, R Vives

  • 1Servicio de Alergia, Hospital Universitario 12 de Octubre, Madrid, Spain.

Allergy
|August 1, 1997
PubMed
Summary
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Occupational asthma from inhaling fish has not been previously documented. This study confirms fish inhalation can cause occupational asthma in two workers, evidenced by specific bronchial challenge tests.

Area of Science:

  • Allergy and Immunology
  • Occupational Medicine
  • Respiratory Medicine

Background:

  • Occupational asthma (OA) is a significant work-related respiratory condition.
  • The role of specific occupational exposures, such as fish inhalation, in inducing OA requires further investigation.
  • Diagnostic confirmation of OA typically involves specific bronchial challenge (SBC) and objective monitoring.

Observation:

  • Two fish-processing workers presented with asthma symptoms correlated with their work environment.
  • Diagnostic evaluations included skin prick tests, specific IgE antibody assays, methacholine challenge, peak expiratory flow rate (PEFR) monitoring, and SBC.
  • Both patients exhibited positive skin tests and specific IgE to various fish species, with significant PEFR variations between work and non-work periods.

Findings:

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  • Specific bronchial challenge (SBC) with fish extracts confirmed IgE-mediated occupational asthma in both patients.
  • Patient 1 showed positive responses to plaice, salmon, hake, and tuna, while Patient 2 reacted to salmon.
  • Methacholine challenge was positive in one patient, indicating nonspecific bronchial hyperresponsiveness.

Implications:

  • This study provides the first evidence suggesting that fish inhalation can trigger IgE-mediated occupational asthma.
  • Findings highlight the importance of considering fish exposure as a potential cause of OA in relevant occupational settings.
  • Further research is warranted to elucidate the prevalence and specific allergens involved in fish-induced occupational asthma.